Regulator and recording regulator



Aug. 11, 1936. TATE 2,050,742

REGULATOR AND RECORDING REGULATOR Filed Aug. 5, 1933 2 Sheets-Sheet 1 3f 7 g v I a 58 I [5 a r 3 A31:

r--1/ Z 63/ I 4 all I 4a 2 ermet -ae ATTORIZEY 1 Aug. 11, 1936. K. L. TATE 2,050,742

REGULATOR AND RECORDING REGULATOR Filed Aug. 5, 1933 2 Sheets-Sheet 2 INVENTOR .50 7 4 52:90am LTaze' ATTORNEY Patented Aug. 11, 1936 UN 1 T I I l i,

Kenneth ll. 'Iiate,

Taylor instrument litccheeter, N.

K, assigncr tc (Companies, Rochester,

N. EL, a corperation ct New York Appiication August 5, 1933, Serial No. ceases i (till. 175-375) This invention relates to regulating systems and more particularly to electrical regulating sys tems provided with recording means.

In various installations it is important to provide an instrument which closes or opens a set of electrical contacts at a predetermined tempera.- ture and which may be provided with mechanism that simultaneously makes a record of the prevailing temperature in the regulated medium. such an instrument is especially useiul in controlling the operating circuit of an electric motor which operates a pump for circulating the hot medium in a spray vat pasteurizer, and it is also particularly adapted for turning on and ofi the electric heating element in an incubator, as well as for recording the temperature prevailing in the incubator.

In prior instruments in which a therrno-respon sive element was employed for controlling the electrical circuit, much difliculty has been encountered due to the arcing at the switch contacts with the consequent rapid disintegration of these contacts, and also due to the usual contact oscillation with the re 25 sultant undesirable on and o action of the motor or heating element to be controlled.

in accordance with the present invention, a novel arrangement is provided in which circuit controlling contacts are actuated, with no load on the regulating instrument by a quick opening and closing movement in response to the operation of a condition-responsive device forming a part of the instrument. I

A further feature of the invention relates to a novel arrangement for effecting a micrometer adiustment between the actuating bracket oi a Bourdon spring and an indicator actuated there' by, to establish the set-point oi the instrument of which they are a part.

These and other features of the invention will than: aMm-iwhinn and claims showing the switch closed; and Fig. is a similar view showing the switch opened.

Referring to the drawings, i designates a main instrument case and it a switch receptacle mounted thereon, in which a time-delay-relay 3 5 of the dash-pot or retarded-action type and a solenoid-operated switch or contactor 5 controlled thereby, are'mounted. The time-delay relay 3 is of the well-known type including an energizing winding ta, a movable core 3b therein for moving 0 the movable contacts tie into engagement with the fixed contacts 3}. The lower part of the solenoid includes a reservoir or dash-pot 307 containing oil or similar viscous material in which the plunger 30 attached to the core 8b is movable up and down. This plunger is provided witha valve (not shown) whereby the upward movement of the core 3b is rendered sluggish, but its downward movement is effected with only a slight time delay. The contactor ii is of the usual structure including an actuating winding and a movable core do. therein to close contacts which for the most part are concealed in Fig. 1 but which are diagrammatically shown in Fig. 5. The rear wall of the case supports the fixed ends oi the Bourdon springs l and ii, which ends communicate respectively through the branch capillary tubes 9 and it with a main capillary tube ill, in turn, communicating with a bulb it. It will be understood that the bulb is exposed to the medium, the temperature or other condition of which is to be regulated. This bulb, as well as the capillary tubes and the Bourdon springs, constitute a tube system which is herein illustrated as being vapor-filled, but the invention is equally well adapted for use in connection with mercury or gas-filled tube systems. A bracket i3, mounted on the Bourdon spring i near the closed free end thereof, has pivotally connected thereto, one end of a link it having its other end pivotally attached at point Hi to a V-shaped pen arm adjusting support l6.

. d .inm mm arm l9; are

member periodically oscillating across the path of movement of said arm, electrical contacts carried by said member arranged to be opened by the engagement of said arm with said member, and a switch having contacts which close slowly and which open less slowly, said switch being controlled by said electricalcontacts.

4. In a device of the class described, an arm movable in response to a changing condition, a member periodically movable across the path of movement of said arm, normally inactive electrical contacts actuated by the periodic engagement with said arm and said member, discriminating means responsive only to a continuous inaction of said contacts, and contacts controlled by said discriminating means.

5 In a device of the class described, a movably mounted arm actuated in accordance with a condition to be regulated, a bar rigidly mounted adjacent to one side of the end portion of said arm, an intermittently oscillated switch provided with contacts and a contact actuator therefor operated at a predetermined condition by its engagement with said arm and the consequent engagement of said arm with said bar, and a slow-acting switch having a circuit controlled by the contacts of said first-mentioned switch.

6. In a device of the class described, a thermoresponsive mechanism including a Bourdon spring with a capillary tube and a thermo-responsive bulb containing an expansible medium a pivoted arm actuated by said Bourdon spring, a fixed bar at one side of the end portion of said arm, a switch pivotally mounted for movement toward and away' from said bar, said switch including snap-action contacts, a contact actuator engaging said contacts and extending through a wall of said switch in a position to actuate said contacts when said actuator engages said arm and forces the same against said bar, and means including a constantly driven cam and a follower for oscillating said switch. a

7. In an arrangement of the class described, a member actuated in accordance with a changing condition, an arm actuated by said member, said arm being movable with respect to said member,

a difierential adjusting screw having portions 20 with screw threads of different pitch, means on said member for engaging one threaded portion, and means on said arm for engaging the other threaded portion whereby said arm may be adjusted with respect to said member.

KENNETH L TATE.

Aug. 11, 1936. c. H. BISSELL WORK CYCLE TIMER Filed Jan. .18, 1932 4 Sheets-Sheet 1 fiflgI/VENTOR. 4444! i ATTORNEYS. 

